APA (7th ed.) Citation

Gelca, T. A. &. R. (2009). Mathematical Olympiad Challenges: Second Edition. Birkhauser Boston.

Chicago Style (17th ed.) Citation

Gelca, Titu Andreescu & Razvan. Mathematical Olympiad Challenges: Second Edition. Birkhauser Boston, 2009.

MLA (8th ed.) Citation

Gelca, Titu Andreescu & Razvan. Mathematical Olympiad Challenges: Second Edition. Birkhauser Boston, 2009.

Warning: These citations may not always be 100% accurate.